could arbitrate
Verbo regular: arbitrate - arbitrated- arbitrated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could arbitrate
you could arbitrate
he could arbitrate
we could arbitrate
you could arbitrate
they could arbitrate 	I could be arbitrating
you could be arbitrating
he could be arbitrating
we could be arbitrating
you could be arbitrating
they could be arbitrating	I could have arbitrated
you could have arbitrated
he could have arbitrated
we could have arbitrated
you could have arbitrated
they could have arbitrated	I could have been arbitrating
you could have been arbitrating
he could have been arbitrating
we could have been arbitrating
you could have been arbitrating
they could have been arbitrating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't arbitrate
you couldn't arbitrate
he couldn't arbitrate
we couldn't arbitrate
you couldn't arbitrate
they couldn't arbitrate 	I couldn't be arbitrating
you couldn't be arbitrating
he couldn't be arbitrating
we couldn't be arbitrating
you couldn't be arbitrating
they couldn't be arbitrating	I couldn't have arbitrated
you couldn't have arbitrated
he couldn't have arbitrated
we couldn't have arbitrated
you couldn't have arbitrated
they couldn't have arbitrated	I couldn't have been arbitrating
you couldn't have been arbitrating
he couldn't have been arbitrating
we couldn't have been arbitrating
you couldn't have been arbitrating
they couldn't have been arbitrating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I arbitrate?
could you arbitrate?
could he arbitrate?
could we arbitrate?
could you arbitrate?
could they arbitrate? 	could I be arbitrating?
could you be arbitrating?
could he be arbitrating?
could we be arbitrating?
could you be arbitrating?
could they be arbitrating? 	could I have arbitrated?
could you have arbitrated?
could he have arbitrated?
could we have arbitrated?
could you have arbitrated?
could they have arbitrated? 	could I have been arbitrating?
could you have been arbitrating?
could he have been arbitrating?
could we have been arbitrating?
could you have been arbitrating?
could they have been arbitrating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I arbitrate?
couldn't you arbitrate?
couldn't he arbitrate?
couldn't we arbitrate?
couldn't you arbitrate?
couldn't they arbitrate? 	couldn't I be arbitrating?
couldn't you be arbitrating?
couldn't he be arbitrating?
couldn't we be arbitrating?
couldn't you be arbitrating?
couldn't they be arbitrating? 	couldn't I have arbitrated?
couldn't you have arbitrated?
couldn't he have arbitrated?
couldn't we have arbitrated?
couldn't you have arbitrated?
couldn't they have arbitrated? 	couldn't I have been arbitrating?
couldn't you have been arbitrating?
couldn't he have been arbitrating?
couldn't we have been arbitrating?
couldn't you have been arbitrating?
couldn't they have been arbitrating?